MarkerCategory(CachedMarkerBuilder cachedMarkerBuilder, int startIndex, int endIndex, String categoryName) Create a new instance of the receiver that has the markers between
startIndex and endIndex showing.
Create a new instance of the receiver that has the markers between
startIndex and endIndex showing.
Parameters: cachedMarkerBuilder - Parameters: startIndex - Parameters: endIndex - Parameters: cachedMarkerBuilder - the builder used to generate the children lazily.